Fehler 50103

[Frankentaler]

Hi there!

I've got a few quite simple questions:

I'm trying to realize a measure with 3 analog-in channels. my stupid "noob" idea was to copy the VI, paste it below ans change the physical channel and names in order to realize another channel. that doesn't work and i receive "fehler 50103".

How can I get two other channels? For each one a file to save the data should be created and i would like to see the diagramm in the same display.

To make it clear, see the snapshot of my VI. 

Thanks a lot for your answers! 

[F._Schubert]

You would perform all measurements in the same task. Look up the DAQmx help for 'Physikalischer Kanal', you can name it like ai0:2 to measure ai0, ai1, ai2.

Felix 

[Frankentaler]

I do not understand, sorry. What does that mean? Where can I choose more than one channel in the VI "create virtual channel"?

[F._Schubert]

The front panel control 'Physikalischer Kanal' is something like 'dev1/ai0'. Try to use 'dev1/ai0:2'. The rest is already set up for multi-channel measurement.

Felix 

[Frankentaler]

But the programme I've posted within the picture does work! 

I tried to copy all what you can see there in order to create another channel and set the physical channnel to another one. 

Sorry, but I can't catch what you mean! 

[F._Schubert · Accepted solution]

Well, you just have a single hardware in your system. To go more into detail, if you use an M-Series DAQ you have a single ADC with a multiplexer on the input side. So the driver layer needs to lock your copied code. I tried to explain you, who to do it the right way: Only one task (because only one device) but set it up for multichannel measurement.

Felix 

[Frankentaler]

Ah okay. See what you mean now. Thanks.

But if I change the physical channels to "ai0:2", I receive a new mistake: "Fehler 50405 - Es findet keine Übertragung stat,..."

Arrrgh!! What's happening now? 

[Frankentaler]

Stop! It works! Thank you so much!

[F._Schubert]

Glückwunsch.

Felix